Your newest assignment from S.P.I.E.S. headquarters seems to have been intercepted by hostile agents. They left the first line of each paragraph intact, but the rest are thrown together all higgledy-piggledy.

Tra-la-la, tra-la-la...

Iffigy, effigy...

Thickety, thackety...

Twiddle-dum, twiddle-dee...

Dandeline, vangeline...

Agamemnonides
Agent and this.
Aren't fit for epics! It's
Challenging final years
Characteristically
Die on her altar one
Fine afternoon.
Goddess of this, of the
"Hendecasyllables
Henry declared.
Hoped that with Vergil he
H. Wadsworth Longfellow
Jean and Elizabeth
Kept doing this through the
Ludwig van Beethoven,
Might be compared.
Morphosyntactical
Nearly demanded that
Not far amiss:
Not really hear,
Offer a guideline that's
Of his career.
Often semantically
Pleasure and fun.
Starred in commercials where
Subject and object are
Theta-role theorists
This in hexameter!"
Though by that time he could
Try to do this to their
Two spoke as one,
Unhesitatingly
Urging their viewers to
Virginal Artemis,
Wild, and the moon,